Pulverizing-mill.



No- 829,173. PATENTED AUG. 21, 1906. A. J. SAOKETT.

PULVERIZING MILL. urmonmu FILED JUNE 20, 1005.

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N -V 829,173. PATENTED AUG. 21, 1906.

A. J. SAOKETT.

PULVERIZING MILL.

APPLICATION nun mm: 26, 1905.

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IN VENTOR.

ATTORNEY.

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PATENTED AUG. 21 1906.

A. J. 'SAGKETT. PULV ERIZING MILL.

APPLICATION FILED JUNE 2a. 1905.

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ATTORNEY.

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AUGUST J. SACKETT, OF BALTIMORE, MARYLAND.

PULVERIZING-MILL.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application fled June 26, 1905- Serial No. 2667916.

To all whom it may concern.-

Be it known that I, AUGUsT J. SAGKETT, of the city of Baltimore andState of Maryland, have invented certain Improvements inPulverizing-Mills, of which the following is a specification.

This invention relates to certain improvements in a ulverizing-milladapted for the reduction of materials such as phosphate rock, for whichLetters Patent No. 777,922 were granted to me on the 20th da' ofDecember, 1904, to which reference s ould be tain of its attachmentsforming a part of the mill. Fig. 6 is an enlarged end view of one of aseries of plates, illustrated in plan in Iteferrin now to the drawings,the frame of the mil is shown as consisting of four ribbed columns 1,united at the bottom by the flanged base-plate 2 and provided withbrackets 3, which support the circular ilate 5, forming the bottom ofthe receiving-c amber of the mill. The lower section a of the annularwall of the receiving-chamber is in tegral with the circular plate 5 andflanged at its edge, and the section b of the said wall, which is aboveand attached to the flange of section a, is made in segments to admit ofthe easy removal of one or more of the segments should they become worn.The formation of the part b of the Wall in segments does not constitutea part of the present invention, and the segmental construction is not,therefore, shown in the drawings 7 is a central rotary shaft seated inthe step 9 and journaled in a boss 10, formed as a part of the plate 5.To this shaft is socured the beveled gear-wheel 11, which is driven fromthe horizontal shaft 12 (shown only in Fi 1) by means of the beveled pinion 13. (lilac shown in Fig. 1.)

1.4 is a disk havin r a conical pulverizingface a, the hub of w liich isfastened to the end of the central rotary shaft 7.

15 is a covering-plate having an annular conical lower pulverizing-face0, similar to the one d of the disk 14.

17 17 are conical rolls, shown as eight in number, adapted to turnloosely on studs 19, the inner ends of which are fastened in a rotaryhead 20, situated centrally of and above the disk 14. To provide forlubrication of the studs within the rolls 17, suitable oilducts (denotedin. Figs. 4 and 5 byf) are made in the studs, and to prevent theentrance of dust and grit from the materials which are ulverized theends of the studs are covered iiy ca s g, which have a central hole hfor the intro( notion of the lubricants, and which is sto ped by a plugj. The said rolls are held tig itly between the conical surfaces (1 ande by means of the sprin -held bars 21, pivoted to arms 23, projecting omthe circumference of the coverin -plate 15. The rotary head 20 has acentrzl fixed shaft 24, which is loose in a pendent boss 25, integralwith the covering-plate 15. The conical rolls 17 are revolved around thecentral shaft 7 by the retation of the disk 14 and in such motionpulverizes any material which may be situated between them and the twoconical faces (1 and e.

27 is a hopper fastened to the top of the non-rotary covering-plate 15,into which the materials to be pulverized are introduced, and 29 anadjustable gate having a suitable handle, which, in connection with agrated plate 30, which is a part of the plate 15, is used to control thepassage of the said materials from the hop or to the pulverizing-rolls.The pulverizefmaterials as they pass from the pulverizing-rolls fall toan annular channel 32, formed in the rotary disk 14, and are agitated bythe wings 34, (shown particularly in Fig. 4,) which for convenience ofattachment are integral with the caps and rotate with them and the saidrolls.

35 is a cylindrical screen, shown as fastened to the edge of the disk14, so as to rotate with it, and the screen is closed at the top by aflange 36 on the non-rotary coveringplate 15.

The ulverized material issuing from the screen alls to the space 37below the disk 14 and. is carried by the scrapers 39, one only of whichis shown in Fig. 3, to the deliverychute 40.

42 42 are plates (shown :in Figs. 2 and 6) bolted to the head 20 betweenthe rolls 17, having an inclined extension k, which in the operation ofthe mill plows up a portion of the upper stratum of the material in theprocess of grinding, which lies on the disk 14 between the conicalrolls, and causes it to pass to the upper portion of the rolls, thusincreasing the. cl'l'ect of the pulverizing devices.

43 43 are segmental plates, shown in Figs. 2 and 6 as integral with theinclined extensions Ar of the plates 4-2 and situated between the rolls,to retard the outward movement of the nnground materials due tocentrifugal force and prevent tl'ieir-passing to the annular channel 32without being pulverized, and in order that they will not interfere withthe operation of the inclined extensions it they are placed about midwayof the length of the rolls, as shown in Fig. 2, thus leaving aboutone-half of each roll exterior of the plates upon which the flowed-upmaterials will fall to be again acted on by the rolls.

In the operation of the mill the lift of the ciWering-plate, due tothere not always being a uniform thickness of the materials between therolls and the conical surface of the said plate, will not be uniformthroughout the entire circumference of the plate, and to admit of thisirregular movement of tilting of the plate and at the same time toprovide guides for the same which will produce little friction the arms23 of the covering-plate are constructed to move betweenantifrietion-rollers 44, arranged to rotate in lugs which project fromthe upper ends of the ribbed columns 1. This construction is best shownin Figs. 1 and 1 claim as my invention- 1. In a pnlvcrizing-mill, thecombination of a stationary receivin -chamber, a rotary disk and anon-rotary p ate having opposed conical faces, holding devices to drawthe disk and plate toward each other, and. conical rolls which areinterposed between the said conical faces, which in the rotary movementof the disk are rotated on their axes and revolved around the disk, thesaid rotary disk being provided with an annular chamber situatedexteriorly of the outer ends of the rolls to receive the groundmaterials, and a cylindrical screen situated at the circumference of thesaid rotary disk, whereby the pulverized materials are screened beforeentering the receiving-chain] cr, substantially as specified.

2. In a pulveriZing-mill, the combination of a stationaryreceiving-chambcr, a rotary disk and a non-rotary plate having opposedconical l'accs, holding devices to draw the disk and plate toward eachother, conical rolls which are interposed between the said conicalfaces, and which in the rotary movement of the disk are rotated on theiraxes and revolved around the disk, a cylindrical screen situated at thecircumference of the said. rotary disk, whereby the pulverized materialsare screened before entering the receivingchamber, and devices carriedby the said rolls which serve to agitate the ground materials within thesaid screen and return a portion of them to the upper surface of thesaid rolls to be rcpnlverized, substantially as specified.

3. In a pnlvcriZing-mill, the combination of a rotary disk and anon-rotary plate having opposed conical faces, conical rolls which areinterposed between the conical faces, which in the rotary movement ofthe disk are rotated on their axes and revolved around the disk, meansto draw the said non-rotary plate toward the rotary disk, fixed devicessituated exteriorly of the non-rotary plate whereby the same is heldagainst rotation, the same carrying rollers between which extensions ofthe non-rotary plate are situated and are guided in their up-and-downmovement, substantially as specified.

4. In a pnlverizing-mill, the combination of a stationaryreceiving-chamber, a rotary disk and a non-rotary plate having opposedconical faces, holding devices to draw the disk and plate toward eachother, and. conical rolls which are interposed between the said conicalfaces, which in the rotary movement of the disk are rotated on theiraxes and revolved around the disk, the said rotary disk being rovidedwith an annular chamber situate exteriorly of the outer ends of therolls to receive the ground materials, substantially as specified.

AUGUST J SACKETT.

Witnesses:

A. O. BAYLEY. ()REGON MILTON DENNIS.

